Just a note, the official JLR maps are found at landrover.here.com (US site) after you log in and then select "Maps & Services" at the top. You can then use their tool to download the latest map update to a USB stick (32GB recommended) and follow the prompts on your top screen after plugging in to update.

For what it's worth, I have not personally done this and am actually afraid to in case it doesn't work properly and then I'm without a map lol. I'd ask your dealer to update for you. If anyone does this successfully, please share!

I have successfully performed 2 map updates myself. Followed the instructions carefully using a USB 3 stick, and both times went very smoothly. The download is pretty big (7 GB) but install onto the car took about 10 mins.